有机质与粘粒复合对土壤阳离子交换量的贡献

对棕壤、黄棕壤、黄褐土和(土娄)土344个样品阳离子交换量(CEC)与有机质、粘粒用方程y(CEC)=b_0+b_1χ_1(粘粒％)+b_2χ_3(有机质％)+b_3χ_1χ_2进行回归分析表明,在粘粒与有机质数量比为3～16(平均为8左右接近有机质与粘粒CEC之比)时,有机粘粒复合显著影响土壤CEC,且复合消耗有机质与粘粒总交换点的数量分别为41.8％,26.7％,31.9％和19.8％。

Contribution of Organic Matter and Clay Complex to Cation Exchange Capacity in Soils

Results analysed by using multiple regression equation. F(CEC) = 60+61x1 (clay%) +62x2 (organic matter%) +b3iilxi of CEC, organic matter and clay of 344 soil samples of brown earth,yellow brown earth, yellow drab-earth and lou soil indicated that when the content ratio of clay to organic matter Was 3-16 (average 8 or so, close to the CEC rate of organic matter to clay) , the organic-clay complex affected soil CEC significantly. This also revealed the complex depleted an amount of total exchange-site of clay and organic matter by 41.8%} 26.7%} 31.9% and!9.8% in four types of soils.